Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1073/pnas.1913584117 |
Dry and moist dynamics shape regional patterns of extreme precipitation sensitivity | |
Nie, Ji1; Dai, Panxi1; Sobel, Adam H.2 | |
2020-04-21 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2020 |
卷号 | 117期号:16页码:8757-8763 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; USA |
英文摘要 | Responses of extreme precipitation to global warming are of great importance to society and ecosystems. Although observations and climate projections indicate a general intensification of extreme precipitation with warming on global scale, there are significant variations on the regional scale, mainly due to changes in the vertical motion associated with extreme precipitation. Here, we apply quasigeostrophic diagnostics on climate-model simulations to understand the changes in vertical motion, quantifying the roles of dry (large-scale adiabatic flow) and moist (small-scale convection) dynamics in shaping the regional patterns of extreme precipitation sensitivity (EPS). The dry component weakens in the subtropics but strengthens in the middle and high latitudes; the moist component accounts for the positive centers of EPS in the low latitudes and also contributes to the negative centers in the subtropics. A theoretical model depicts a nonlinear relationship between the diabatic heating feedback (alpha) and precipitable water, indicating high sensitivity of ff (thus, EPS) over climatological moist regions. The model also captures the change of alpha due to competing effects of increases in precipitable water and dry static stability under global warming. Thus, the dry/moist decomposition provides a quantitive and intuitive explanation of the main regional features of EPS. |
英文关键词 | precipitation extreme convection climate change |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000528260600019 |
WOS关键词 | FUTURE CHANGES ; EXTRATROPICAL CYCLONES ; CLIMATE-CHANGE ; STORM TRACKS ; SIMULATIONS ; SCALE ; CIRCULATIONS ; TEMPERATURE ; CONVECTION ; STABILITY |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/249543 |
专题 | 地球科学 |
作者单位 | 1.Peking Univ, Dept Atmospher & Ocean Sci, Beijing 100871, Peoples R China; 2.Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10027 USA |
推荐引用方式 GB/T 7714 | Nie, Ji,Dai, Panxi,Sobel, Adam H.. Dry and moist dynamics shape regional patterns of extreme precipitation sensitivity[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2020,117(16):8757-8763. |
APA | Nie, Ji,Dai, Panxi,&Sobel, Adam H..(2020).Dry and moist dynamics shape regional patterns of extreme precipitation sensitivity.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117(16),8757-8763. |
MLA | Nie, Ji,et al."Dry and moist dynamics shape regional patterns of extreme precipitation sensitivity".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117.16(2020):8757-8763. |
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